Piston ring



E. G. MENZENWERTH. PISTON RING.

APPLICATION FILED MAR. 24, 1921.

1,406,054. Patented Feb. 7, 1922.

/NVENTO'R ERW/N GnMENZE/VWERTH mm mm mmrznnwnarn, or s'r.

rrsron came Application filed March 24,

i To all whom it may concern:

Be it knownthat- I, ERWIN .GUs'rAvn MEN- 7 zENWER-TH, a citizenof the United States, re-

' siding at St. Louis,

a certain new and'useful Improvement-1n will enable others skilled in the art Missouri, have invented Piston Rings, of which the following is a full, clear, and exact description, such as, to which it appertains' to make and use the same,' reference being had to the accompanylng drawings forming part of this specification,

in Which-#- ring.

face ring.

Q the line -5 of Figure improvements in piston packing rings, the

' cylinder bearing rings 4 and Figure 1 is a plan view of the assembled Figure 2 is a planview of one of the sur 7 face rings.

Figure 3 is a plan view of the other sur- I Figure 4 is a cross sectional view along the line 4--'4 of Figure 1.

Figure 5.is a cross sectional view along Figure 6 is a perspective view of one of the surface rings. c i p This invention relates to new and useful a ring that will 'operobject being to make 1 comparatively ate effectively and yet is cheap to manufacture due to the simplicity of its parts. r V

In the drawings, lrindicates an innerbase or bull ring having a diagonal splitor opening 2 and a circumferential groove 3' which extends around the entireouter' periphery. I Two eylinder'bearing rings 4? and 5 have v ribs 6 and 7 V which fit in the groove 3; These- 5 are slightly longer than one-half thecircumference of the base or bull ring and have overlapping ends 8, 9, l0, and 11 which form L-shapedI projections. The ribs 6 and 7 of the cylinder bearingrings fit'into the groove 3 of the bull ring and maintain the parts in theirg '8 and 11- to'maintain a assembled positions. Y I p A pin 12 is fixed in the bull ring soas'to cooperate with the two L-shaped projections break joint and pre- Y vent the movement of the parts in relation 7 to each other. V c 7 piston, it is In applying a ring as shown herein to a expanded until it can be slipped over the end of the piston and it is then forced downwardly until it enters one of the piston vring grooves in the piston. In order -'-ran'gement, together with the pin therein,

LOUIS, ms'souar;

192i. Serial No. 455,032.

to' insert the piston into the cylinder after the ring is positioned, it is necessary to contract the ring.

itmaintains a regular shape, and when contracted in the cylinder, it will bear on the cylinder walls at all points uniformly. This type of ring is ver factured. It is out. prefera 'ly from a pot or cylinder-of cast iron-that has been machined to the size desired for the part being made. Both cylinder bearing rings maybe cut from the same portion the correspond in size and shape. 1; is preferred to make this hundred forty degr proximately sixty degree 12 whichis fixed in the base or bull ring to maintain a fixed relation between the cylinder bearing ring, prevents any two joints from coinciding.

' easily manu- 7 ring so'that. ieach of the cylinder bearing parts are two Patented Feb. 7,- 1922.

The structure ofthe ring' is such that-when it is contracted or expanded,

of the pot since I ees (2&0") of acircle and the L-shaped pro ection on either end is ap-" This ar T bull ring and the V This construction provides for the uniform expansion of the various parts so that in operation irregularities in the cylinder or piston connection.

claim periphe and two; cylinder bearing rings -shape in cross section and engaging said bull-ring, each. of said cylinder bearing rings being divided circumferentially so as this ring will make up for any h and 1 atthe same time maintainan efficient pack- 5 I 8 5 1.; The combination of asplit bull-ring havmg a'circumferential groove in its outer to provide .L-shaped overlapping portions and each of said cylinder ference of the bull-lung whereby the parts remain. in position when assembled, and means for retaining a haped cylinder bearing bearing rings being 7 "of a length: exceedln one-half the oil-cum rings,v each less than one-half the diameter of' the bull-ring and complementarily fitting and both having overlapping portlons extending beyond "one-half the diameter of the bull-ring.

In testimony whereof Ihereunto afiix my signature this 19th day of March, 1921.

ERWIN GUSTAV! MENZENWERTH. 

